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P Commands

This chapter describes the Cisco NX-OS interface commands that begin with P.

peer-switch

To enable the virtual port channel (vPC) switch pair to appear as a single Spanning Tree Protocol (STP) root in the Layer 2 topology, use the peer-switch command. To disable the peer switch vPC topology, use the no form of this command.

peer-switch

no peer-switch

Syntax Description

This command has no arguments or keywords.

Defaults

Peer switch Layer 2 topology is disabled.

Command Modes

vPC domain configuration mode

Supported User Roles

network-admin

Command History

Release

Modification

6.0(2)N1(1)

This command was introduced.

Usage Guidelines

This command does not require a license.

Examples

This example shows how to enable the vPC switch pair to appear as a single STP root in the Layer 2 topology:

Related Commands

port

To configure a unified port on a Cisco Nexus 5548UP switch or Cisco Nexus 5596UP switch, use the port command. To remove the unified port, use the no form of this command.

port port-number type { ethernet | fc }

no port port-number type { ethernet | fc }

Syntax Description

port-number

Port number. The range is from 1 to 199.

type

Specifies the type of port to configure on a slot in a chassis.

ethernet

Specifies an Ethernet port.

fc

Specifies a Fibre Channel (FC) port.

Command Default

None

Command Modes

Slot configuration mode

Command History

Release

Modification

6.0(2)N1(1)

This command was introduced.

Usage Guidelines

Unified ports allow you to configure ports as Ethernet, native Fibre Channel or Fibre Channel over Ethernet (FCoE) ports. By default, the ports are Ethernet ports but you can change the port mode to Fibre Channel on the following unified ports:

Any port on the Cisco Nexus 5548UP switch or the Cisco Nexus 5596UP switch.

The ports on the Cisco N55-M16UP expansion module that is installed in a Cisco Nexus 5548P switch.

You must configure Ethernet ports and FC ports in a specified order:

FC ports must be configured from the last port of the module.

Ethernet ports must be configured from the first port of the module.

If the order is not followed, the following errors are displayed:

ERROR: Ethernet range starts from first port of the moduleERROR: FC range should end on last port of the module

On a Cisco Nexus 5548UP switch, the 32 ports of the main slot (slot1) are unified ports. The Ethernet ports start from port 1/1 to port 1/32. The FC ports start from port 1/32 backwards to port 1/1.

Examples

This example shows how to configure a unified port on a Cisco Nexus 5548UP switch or Cisco Nexus 5596UP switch:

Related Commands

Enables preprovisioning of features or interfaces of a module on a slot in a chassis.

reload

Reloads the switch and all attached Fabric Extender chassis or a specific Fabric Extender.

port-channel load-balance ethernet

To configure the load-balancing method among the interfaces in the channel-group bundle, use the port-channel load-balance ethernet command. To return the system priority to the default value, use the no form of this command.

port-channel load-balance ethernet method

no port-channel load-balance ethernet [ method ]

Syntax Description

method

Load-balancing method. See the “Usage Guidelines” section for a list of valid values.

Command Default

Loads distribution on the source and destination MAC address. The default hash polynomial is CRC8a.

Command Modes

Global configuration mode

Command History

Release

Modification

6.0(2)N1(1)

This command was introduced.

Usage Guidelines

The valid load-balancing method values are as follows:

destination-ip —Loads distribution on the destination IP address.

destination-mac —Loads distribution on the destination MAC address.

destination-port —Loads distribution on the destination port.

source-destination-ip —Loads distribution on the source and destination IP address.

source-destination-mac —Loads distribution on the source and destination MAC address.

source-destination-port —Loads distribution on the source and destination port.

source-ip —Loads distribution on the source IP address.

source-mac —Loads distribution on the source MAC address.

source-port —Loads distribution on the source port.

Use the option that provides the balance criteria with the greatest variety in your configuration. For example, if the traffic on an EtherChannel is going only to a single MAC address and you use the destination MAC address as the basis of EtherChannel load balancing, the EtherChannel always chooses the same link in that EtherChannel; using source addresses or IP addresses might result in better load balancing.

Examples

This example shows how to set the load-balancing method to use the source IP: